linux-stable.git/include/acpi/actypes.h, branch v5.18.2 Linux kernel stable tree ACPICA: Use uintptr_t and offsetof() in Linux kernel builds 2022-01-25T17:41:23+00:00 Rafael J. Wysocki rafael.j.wysocki@intel.com 2022-01-11T15:55:25+00:00 ae57857b9b6341096ddfd9c0cf26fb640c561160 To avoid "performing pointer subtraction with a null pointer has undefined behavior" compiler warnings, use uintptr_t and offsetof() that are always available during Linux kernel builds to define acpi_uintptr_t and the ACPI_TO_INTEGER() and ACPI_OFFSET() macros. Based on earlier proposal from Arnd Bergmann. Link: https://lore.kernel.org/linux-acpi/20210927121338.938994-1-arnd@kernel.org Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> Reviewed-by: Arnd Bergmann <arnd@arndb.de> 
To avoid "performing pointer subtraction with a null pointer has
undefined behavior" compiler warnings, use uintptr_t and offsetof()
that are always available during Linux kernel builds to define
acpi_uintptr_t and the ACPI_TO_INTEGER() and ACPI_OFFSET() macros.

Based on earlier proposal from Arnd Bergmann.

Link: https://lore.kernel.org/linux-acpi/20210927121338.938994-1-arnd@kernel.org
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Reviewed-by: Arnd Bergmann <arnd@arndb.de>
ACPICA: Add support for PCC Opregion special context data 2021-12-27T16:01:28+00:00 Sudeep Holla sudeep.holla@arm.com 2021-12-22T16:32:54+00:00 0acf24ad7e10f547809faefb8069f8f5482eb4d9 ACPICA commit 55526e8a6133cbf5a9cc0fb75a95dbbac6eb98e6 PCC Opregion added in ACPIC 6.3 requires special context data similar to GPIO and Generic Serial Bus as it needs to know the internal PCC buffer and its length as well as the PCC channel index when the opregion handler is being executed by the OSPM. Lets add support for the special context data needed by PCC Opregion. Link: https://github.com/acpica/acpica/commit/55526e8a Signed-off-by: Sudeep Holla <sudeep.holla@arm.com> Signed-off-by: Bob Moore <robert.moore@intel.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> 
ACPICA commit 55526e8a6133cbf5a9cc0fb75a95dbbac6eb98e6

PCC Opregion added in ACPIC 6.3 requires special context data similar
to GPIO and Generic Serial Bus as it needs to know the internal PCC
buffer and its length as well as the PCC channel index when the opregion
handler is being executed by the OSPM.

Lets add support for the special context data needed by PCC Opregion.

Link: https://github.com/acpica/acpica/commit/55526e8a
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
Signed-off-by: Bob Moore <robert.moore@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
ACPICA: Macros: Remove ACPI_PHYSADDR_TO_PTR 2021-12-27T16:01:28+00:00 Jessica Clarke jrtc27@jrtc27.com 2021-12-22T16:23:28+00:00 339651be3704f336634d90c000a7778b86e1be99 ACPICA commit 52abebd410945ec55afb4dd8b7150e8a39b5c960 This macro was only ever used when stuffing pointers into physical addresses and trying to later reconstruct the pointer, which is implementation-defined as to whether that can be done. Now that all such operations are gone, the macro is unused, and should be removed to avoid such practices being reintroduced. Link: https://github.com/acpica/acpica/commit/52abebd4 Signed-off-by: Bob Moore <robert.moore@intel.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> 
ACPICA commit 52abebd410945ec55afb4dd8b7150e8a39b5c960

This macro was only ever used when stuffing pointers into physical
addresses and trying to later reconstruct the pointer, which is
implementation-defined as to whether that can be done. Now that all such
operations are gone, the macro is unused, and should be removed to avoid
such practices being reintroduced.

Link: https://github.com/acpica/acpica/commit/52abebd4
Signed-off-by: Bob Moore <robert.moore@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
ACPICA: Use original data_table_region pointer for accesses 2021-12-27T16:01:28+00:00 Jessica Clarke jrtc27@jrtc27.com 2021-12-22T16:21:25+00:00 ca25f92b72d25457653dbf2a81f322235804fb05 ACPICA commit d9eb82bd7515989f0b29d79deeeb758db4d6529c Currently the pointer to the table is cast to acpi_physical_address and later cast back to a pointer to be dereferenced. Whether or not this is supported is implementation-defined. On CHERI, and thus Arm's experimental Morello prototype architecture, pointers are represented as capabilities, which are unforgeable bounded pointers, providing always-on fine-grained spatial memory safety. This means that any pointer cast to a plain integer will lose all its associated metadata, and when cast back to a pointer it will give a null-derived pointer (one that has the same metadata as null but an address equal to the integer) that will trap on any dereference. As a result, this is an implementation where acpi_physical_address cannot be used as a hack to store real pointers. Thus, add a new field to struct acpi_object_region to store the pointer for table regions, and propagate it to acpi_ex_data_table_space_handler via the region context, to use a more portable implementation that supports CHERI. Link: https://github.com/acpica/acpica/commit/d9eb82bd Signed-off-by: Bob Moore <robert.moore@intel.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> 
ACPICA commit d9eb82bd7515989f0b29d79deeeb758db4d6529c

Currently the pointer to the table is cast to acpi_physical_address and
later cast back to a pointer to be dereferenced. Whether or not this is
supported is implementation-defined.

On CHERI, and thus Arm's experimental Morello prototype architecture,
pointers are represented as capabilities, which are unforgeable bounded
pointers, providing always-on fine-grained spatial memory safety. This
means that any pointer cast to a plain integer will lose all its
associated metadata, and when cast back to a pointer it will give a
null-derived pointer (one that has the same metadata as null but an
address equal to the integer) that will trap on any dereference. As a
result, this is an implementation where acpi_physical_address cannot be
used as a hack to store real pointers.

Thus, add a new field to struct acpi_object_region to store the pointer for
table regions, and propagate it to acpi_ex_data_table_space_handler via the
region context, to use a more portable implementation that supports
CHERI.

Link: https://github.com/acpica/acpica/commit/d9eb82bd
Signed-off-by: Bob Moore <robert.moore@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
ACPICA: actypes.h: Expand the ACPI_ACCESS_ definitions 2021-12-27T16:01:27+00:00 Mark Langsdorf mlangsdo@redhat.com 2021-12-22T15:57:34+00:00 f81bdeaf816142e0729eea0cc84c395ec9673151 ACPICA commit bc02c76d518135531483dfc276ed28b7ee632ce1 The current ACPI_ACCESS_*_WIDTH defines do not provide a way to test that size is small enough to not cause an overflow when applied to a 32-bit integer. Rather than adding more magic numbers, add ACPI_ACCESS_*_SHIFT, ACPI_ACCESS_*_MAX, and ACPI_ACCESS_*_DEFAULT #defines and redefine ACPI_ACCESS_*_WIDTH in terms of the new #defines. This was inititally reported on Linux where a size of 102 in ACPI_ACCESS_BIT_WIDTH caused an overflow error in the SPCR initialization code. Link: https://github.com/acpica/acpica/commit/bc02c76d Signed-off-by: Mark Langsdorf <mlangsdo@redhat.com> Signed-off-by: Bob Moore <robert.moore@intel.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> 
ACPICA commit bc02c76d518135531483dfc276ed28b7ee632ce1

The current ACPI_ACCESS_*_WIDTH defines do not provide a way to
test that size is small enough to not cause an overflow when
applied to a 32-bit integer.

Rather than adding more magic numbers, add ACPI_ACCESS_*_SHIFT,
ACPI_ACCESS_*_MAX, and ACPI_ACCESS_*_DEFAULT #defines and
redefine ACPI_ACCESS_*_WIDTH in terms of the new #defines.

This was inititally reported on Linux where a size of 102 in
ACPI_ACCESS_BIT_WIDTH caused an overflow error in the SPCR
initialization code.

Link: https://github.com/acpica/acpica/commit/bc02c76d
Signed-off-by: Mark Langsdorf <mlangsdo@redhat.com>
Signed-off-by: Bob Moore <robert.moore@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
ACPICA: Add support for Windows 2020 _OSI string 2021-10-05T13:53:37+00:00 Mario Limonciello mario.limonciello@amd.com 2021-10-01T18:14:47+00:00 3bf70bd2538f0515ce17b1c067889ff0e4fec842 ACPICA commit 2dc55de56d2deac30af0b484dd1d65607eb33a9c Link: https://github.com/microsoft_docs/windows-driver-docs/commit/5164e24985e78ef4870d7a5801a5336104f36366 Link: https://github.com/acpica/acpica/commit/2dc55de5 Signed-off-by: Mario Limonciello <mario.limonciello@amd.com> Signed-off-by: Bob Moore <robert.moore@intel.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> 
ACPICA commit 2dc55de56d2deac30af0b484dd1d65607eb33a9c

Link: https://github.com/microsoft_docs/windows-driver-docs/commit/5164e24985e78ef4870d7a5801a5336104f36366
Link: https://github.com/acpica/acpica/commit/2dc55de5
Signed-off-by: Mario Limonciello <mario.limonciello@amd.com>
Signed-off-by: Bob Moore <robert.moore@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
ACPICA: Updated all copyrights to 2021 2021-01-22T14:51:53+00:00 Bob Moore robert.moore@intel.com 2021-01-15T18:48:25+00:00 4441e55d5051368685b4c75b5157d752f940ee06 This affects all ACPICA source code modules. ACPICA commit c570953c914437e621dd5f160f26ddf352e0d2f4 Link: https://github.com/acpica/acpica/commit/c570953c Signed-off-by: Bob Moore <robert.moore@intel.com> Signed-off-by: Erik Kaneda <erik.kaneda@intel.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> 
This affects all ACPICA source code modules.

ACPICA commit c570953c914437e621dd5f160f26ddf352e0d2f4

Link: https://github.com/acpica/acpica/commit/c570953c
Signed-off-by: Bob Moore <robert.moore@intel.com>
Signed-off-by: Erik Kaneda <erik.kaneda@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
ACPICA: fix -Wfallthrough 2021-01-22T14:51:30+00:00 Nick Desaulniers ndesaulniers@google.com 2021-01-22T00:23:51+00:00 c1a7c2ce7c37a9c51228848647b9908b1cb532d1 ACPICA commit 4b9135f5774caa796ddf826448811e8e7f08ef2f GCC 7.1 gained -Wimplicit-fallthrough to warn on implicit fallthrough, as well as __attribute__((__fallthrough__)) and comments to explicitly denote that cases of fallthrough were intentional. Clang also supports this warning and statement attribute, but not the comment form. Robert Moore provides additional context about the lint comments being removed. They were for "an old version of PC-Lint, which we don't use anymore." Drop those. This will help us enable -Wimplicit-fallthrough throughout the Linux kernel. Suggested-by: Robert Moore <robert.moore@intel.com> Reported-by: Jon Hunter <jonathanh@nvidia.com> Link: https://github.com/acpica/acpica/commit/4b9135f5 Signed-off-by: Nick Desaulniers <ndesaulniers@google.com> Signed-off-by: Bob Moore <robert.moore@intel.com> Signed-off-by: Erik Kaneda <erik.kaneda@intel.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> 
ACPICA commit 4b9135f5774caa796ddf826448811e8e7f08ef2f

GCC 7.1 gained -Wimplicit-fallthrough to warn on implicit fallthrough,
as well as __attribute__((__fallthrough__)) and comments to explicitly
denote that cases of fallthrough were intentional. Clang also supports
this warning and statement attribute, but not the comment form.

Robert Moore provides additional context about the lint comments being
removed. They were for "an old version of PC-Lint, which we don't use
anymore." Drop those.

This will help us enable -Wimplicit-fallthrough throughout the Linux
kernel.

Suggested-by: Robert Moore <robert.moore@intel.com>
Reported-by: Jon Hunter <jonathanh@nvidia.com>

Link: https://github.com/acpica/acpica/commit/4b9135f5
Signed-off-by: Nick Desaulniers <ndesaulniers@google.com>
Signed-off-by: Bob Moore <robert.moore@intel.com>
Signed-off-by: Erik Kaneda <erik.kaneda@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
ACPICA: Drop the repeated word "an" in a comment 2020-10-08T16:03:55+00:00 Randy Dunlap rdunlap@infradead.org 2020-10-08T02:53:56+00:00 ec360131ec27d611e5dc5e03a84d3dc47d4b9ea0 ACPICA commit 9ed2c006444d1def55bc6f08164ed5d9e809c856 Link: https://github.com/acpica/acpica/commit/9ed2c006 Signed-off-by: Randy Dunlap <rdunlap@infradead.org> Signed-off-by: Erik Kaneda <erik.kaneda@intel.com> Signed-off-by: Bob Moore <robert.moore@intel.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> 
ACPICA commit 9ed2c006444d1def55bc6f08164ed5d9e809c856

Link: https://github.com/acpica/acpica/commit/9ed2c006
Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Erik Kaneda <erik.kaneda@intel.com>
Signed-off-by: Bob Moore <robert.moore@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Merge branches 'acpi-mm', 'acpi-tables', 'acpi-apei' and 'acpi-misc' 2020-08-03T11:14:42+00:00 Rafael J. Wysocki rafael.j.wysocki@intel.com 2020-08-03T11:14:42+00:00 db1da2f52ea5477e917957dd80c1da63affa60e6 * acpi-mm: ACPI: OSL: Clean up the removal of unused memory mappings ACPI: OSL: Use deferred unmapping in acpi_os_unmap_iomem() ACPI: OSL: Use deferred unmapping in acpi_os_unmap_generic_address() ACPICA: Preserve memory opregion mappings ACPI: OSL: Implement deferred unmapping of ACPI memory * acpi-tables: ACPI: NUMA: Remove the useless 'node >= MAX_NUMNODES' check ACPI: NUMA: Remove the useless sub table pointer check ACPI: tables: Remove the duplicated checks for acpi_parse_entries_array() ACPI: tables: avoid relocations for table signature array * acpi-apei: ACPI: APEI: remove redundant assignment to variable rc * acpi-misc: ACPI: Replace HTTP links with HTTPS ones ACPI: Use valid link to the ACPI specification ACPI: Use fallthrough pseudo-keyword 
* acpi-mm:
  ACPI: OSL: Clean up the removal of unused memory mappings
  ACPI: OSL: Use deferred unmapping in acpi_os_unmap_iomem()
  ACPI: OSL: Use deferred unmapping in acpi_os_unmap_generic_address()
  ACPICA: Preserve memory opregion mappings
  ACPI: OSL: Implement deferred unmapping of ACPI memory

* acpi-tables:
  ACPI: NUMA: Remove the useless 'node >= MAX_NUMNODES' check
  ACPI: NUMA: Remove the useless sub table pointer check
  ACPI: tables: Remove the duplicated checks for acpi_parse_entries_array()
  ACPI: tables: avoid relocations for table signature array

* acpi-apei:
  ACPI: APEI: remove redundant assignment to variable rc

* acpi-misc:
  ACPI: Replace HTTP links with HTTPS ones
  ACPI: Use valid link to the ACPI specification
  ACPI: Use fallthrough pseudo-keyword